Get Dark Phoenix

Get Bishop

Get Psylocke

Get Bastion

Finish Story Mode using Magneto without losing any matches. You should fight Bastion. Defeat him to unlock him keep in mind you only have one chance if lose you will have to do the whole story over

Get Bishop

Beat Arcade Mode using Gambit

Get Blob

Beat Arcade Mode using Bishop

Get Sentinel A

Beat Arcade Mode using Cyclops

Get Character's 3rd Costume

Beat Story mode using any character

Get Character's 6th Costume

Beat 10 characters in time attack mode using any character in under 15 minutes

Get Character's 7th Costume

Use team mode and fight with 8 characters. Defeat the entire opponent team by only using 2 or more of your characters to unlock the 7th costume for the characters you used

Wolverine gets his original yellow/blue/black costume.Phoenix gets a red/gold costume similar to Dark Phoenix.Juggernaut, Gambit, and Psylocke get a costume similar to their comic book original.
Beast gets a blue costume with a yellow X on his chest, and he also has a helmet.